function circleFun(r){
    this.circumference=function (r) {
        var zc;
        this.zc=r*2*3.14;
        console.log("周长为：",zc);
    }
    this.area=function (r) {
        var mj;
        this.mj=r*r*3.14;
        console.log("面积为：",mj)
    }
    return {circumference:circumference,area:area}
}
module.exports=circleFun;